not a bad mod for your first pk mod, I tried it out and it works well. I agree with jisse, the mod is very bland, not many colour variation, and I don't feel like i'd see these colours very often irl. ( but hey, I live in a different place right? so you might see these colours everyday.)
the mod itself isn't bad, but I like to have a specific goal when running, especially across rooftops. this feels more like something i'd trick on, as there isn't a legitimate goal I can figure out. try making something that goes more in a straight line (not literally, but in the general direction) and you might get some more positive feedback. also try out more colour variation, with brick like reds, and brown roofs, and maybe whit walls or smthng like that. I like the obstacles, but for a compact mod, you've placed a little too many. maybe one or two less would be nice, and switch it up a bit, instead of doing all air vents, maybe a tic tac, or ledges you have to roll or duck or slide under. just a little bit of variety would be nice
for a first pk mod, not great, but better than most first pk mods! I hope to see future mods like this from you in the future